A Note on the Adaptive LASSO for Zero-Inflated Poisson Regression

Table 5

Estimated coefficients from the best-fitting ZIP models in German health care demand data analysis.

(a)

Methods	Count Coefficients
	(Intercept)	hlth	handicap	ddegree	married	schooling	hhincome	children	self	civil	bluec	employed	public	addon
EM LASSO	2.322	-0.14	0.207	-0.002	-0.97	0.0	0.0	0.078	-0.178	-0.166	0.038	-0.106	0.089	0.205
AMAZonn - EM AL	2.305	-0.135	0.111	0.0	-0.947	0.0	0.0	0.079	-0.234	-0.245	0.0	-0.059	0.043	0.205
AMAZonn - EM SEAL	2.378	-0.142	0.098	0.0	-0.066	0.0	0.0	0.046	-0.189	-0.222	0.0	-0.055	0.0	0.14
Methods	Count Coefficients
	ag30	ag35	ag40	ag45	ag50	ag55	ag60	ag30:hlth	ag35:hlth	ag40:hlth	ag45:hlth	ag50:hlth	ag55:hlth	ag60:hlth
EM LASSO	0.0	0.0	0.0	0.586	0.0	-0.27	0.081	0.0	0.0	-0.006	-0.076	0.006	0.082	-0.034
AMAZonn - EM AL	0.0	0.0	-0.047	0.769	0.0	-0.402	0.099	0.0	0.0	0.0	-0.101	0.0	0.106	-0.034
AMAZonn - EM SEAL	0.0	0.0	0.0	0.586	0.0	-0.25	0.0	0.0	0.0	0.0	-0.081	0.0	0.081	-0.017

(b)

Methods	Zero Coefficients
	(Intercept)	hlth	handicap	ddegree	married	schooling	hhincome	children	self	civil	bluec	employed	public	addon
EM LASSO	-2.193	-0.262	-0.098	-0.003	-0.121	0.0	-0.012	0.253	0.112	0.134	0.0	0.0	-0.012	0.0
AMAZonn - EM AL	-2.226	-0.261	-0.162	0.0	0.0	0.0	0.0	0.163	0.0	0.0	0.0	0.0	0.0	0.0
AMAZonn - EM SEAL	-2.403	-0.283	0.0	0.0	-0.053	0.0	0.0	0.238	0.0	0.0	0.0	0.0	0.0	0.0
Methods	Zero Coefficients
	ag30	ag35	ag40	ag45	ag50	ag55	ag60	ag30:hlth	ag35:hlth	ag40:hlth	ag45:hlth	ag50:hlth	ag55:hlth	ag60:hlth
EM LASSO	0.0	0.0	0.0	0.0	-0.459	0.0	-0.217	0.013	0.0	0.005	0.0	0.0	0.023	0.0
AMAZonn - EM AL	0.047	0.0	0.065	0.009	-0.527	0.0	-0.198	0.0	0.0	0.0	0.0	0.0	0.0	0.0
AMAZonn - EM SEAL	0.0	0.0	0.0	0.0	-0.443	0.0	0.0	0.009	0.0	0.0	0.0	0.0	0.0	0.0